MEV Front-Running

MEV front-running is a practice where participants observe pending transactions in the mempool and insert their own transactions ahead of them to capture profit. In the context of liquidations, an attacker might see a liquidation transaction and submit their own with a higher gas fee to get it mined first.

This allows the attacker to steal the liquidation opportunity and the associated rewards from the original liquidator. This is a form of adversarial behavior that impacts the efficiency of the liquidation process.

While it can be seen as part of the game theory of decentralized markets, it creates uncertainty for legitimate liquidators. Protocols often use private mempools or batch auctions to mitigate the impact of front-running.

Understanding MEV is vital for anyone participating in automated liquidation strategies.